Stack Venting
The place where a vent stack must connect at the base of a drainage stack
What is below the lowest fixture?
The minimum size diameter for a wet vent
What is 2"?
A fitting that acts as a one way valve to allow air in for venting without allowing air to escape(against code in Massachusetts)
What is a Provent?
This method of venting a battery system has a relief vent connect to a vent stack downstream of the battery of fixtures.
What is loop venting?
A type of vent in which a waste branch acts as a vent for a fixture on the same floor level
What is wet venting?
The place where a vent stack must connect at the top of a drainage stack
What is 6" above the FLR of the highest fixture being served?
The point to which a wye must be rolled up for a wet vent
What is breaking the centerline?
When a fitting providing a vent is too close to the trap it serves
what is crown venting?
This method of venting a battery system has a relief vent connect to a vent stack upstream of the battery of fixtures.
What is circuit venting?
A vertical pipe in a building that does not receive any drainage and allows air to circulate within the DWV system.
What is a vent stack?
The amount of stories before a relief vent is required for a vent stack
What is 10 stories?
In a bathroom group with a 2-inch horizontal waste, this fixture's 2-inch drain extension is permitted to serve as the wet vent for the bathroom fixtures
What is a Lavatory?
The minimum distance a trap has to be from the fitting that is providing a vent
what is 2 pipe diameters?
When sizing fixtures connected to two parallel horizontal branches, this percentage of the permitted fixture units is used.
What is 50%?
An engineered system with specialized fittings that allow fixtures to be vented without a secondary vent stack.
What is Sovent?
When stack venting fixtures at the highest branch interval of a 3-inch stack, horizontal waste pipes must not exceed this pitch per foot
What is 1/4 inch pitch per foot?
Name two of the five specific fixtures or appliances explicitly prohibited by code from having their waste or vent piping serve as a wet vent
What are Kitchen Sinks, Garbage Disposals, Dishwashers, Washing Machines, or Culinary Fixtures?
The point below which a vent may not connect to a waste branch
What is the trap arm?
Waste from fixtures must enter a battery drainage system at this point on the line.
What is the side center?
This specific type of vent is permitted when an individual vent for a sink or lavatory cannot rise 6 inches above the flood level rim before turning horizontal
What is a bow vent?
The minimum allowable diameter in inches for a main stack vent or vent stack serving a building drain in any structure
What is 3 inches?
Two lavatories installed adjacent to each other within 6 feet of a main stack may be installed on a horizontal waste branch without an independent vent if the branch is at least this size throughout
What is 2 inches?
Combination waste and vent systems are prohibited without Special-Permission and are strictly limited to these two specific plumbing fixtures
What are floor drains and sinks?
Vents in a battery drainage system must be pulled off at this angle.
What is vertical above the centerline?
This must be done in addition to extending the vent 8 feet above the roof when it serves as an observation deck or parking garage.
What is increase by one pipe diameter?